Explain why the write-ahead feature of a write-ahead log is needed.
What will be an ideal response?
The write-ahead feature of a write-ahead log means the update record is appended to the log before the database is updated.
Suppose that the database is updated before the update record is appended to the log. If the system should crash between the update and the log entry, the recovery process has no way of rolling the transaction back. If, on the other hand, the update record is appended first, this problem is avoided.
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Like a loop, a recursive method must have a way to control the number of times it ___________________.
Fill in the blank(s) with the appropriate word(s).
Which 802.11 deployment includes MU MIMO?
A. 802.11a B. 802.11n C. 802.11ac D. 802.11g
When populating a motherboard with DIMM modules, what configuration option will not work?
A. using two different manufacturer's memory B. mixing memory speeds C. leaving a slot unpopulated D. mixing unbuffered with registered
The default: branch can be placed anywhere in the switch statement.
Answer the following statement true (T) or false (F)